Evaluate
21
Factor
3\times 7
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72-\left(6+19-\left(48-57-17\right)\right)
Subtract 4 from 76 to get 72.
72-\left(6+19-\left(-9-17\right)\right)
Subtract 57 from 48 to get -9.
72-\left(6+19-\left(-26\right)\right)
Subtract 17 from -9 to get -26.
72-\left(6+19+26\right)
The opposite of -26 is 26.
72-\left(6+45\right)
Add 19 and 26 to get 45.
72-51
Add 6 and 45 to get 51.
21
Subtract 51 from 72 to get 21.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}